package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private DishService dishService;


    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        // 向菜品表插入1条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        //向口味表插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //给每个flavor 赋值Id
            flavors.forEach(flavor -> {
                flavor.setDishId(dishId);
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new  PageResult(page.getTotal(),page.getResult());
    }
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        /**
         *判断当前菜品是否可以删除
         */


        //1.是否起售中
        for (Long id : ids) {
            Dish dish =dishMapper.getByid(id);
            if (dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //2.是否被套餐关联
        List<Long> results=setmealDishMapper.getSetmealDishIdsByDishIds(ids);
        if (results.size()>0&&results!=null){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //3.删除菜品数据
        dishMapper.deleteById(ids);
        //4.删除关联的口味数据
        dishFlavorMapper.deleteById(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish= dishMapper.getByid(id);
        List<DishFlavor> dishFlavors=  dishFlavorMapper.getByDishId(id);
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }
    @Transactional
    @Override
    public void updateWithFlavor(DishDTO dishDto) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDto, dish);
        dishMapper.updateDish(dish);
        dishFlavorMapper.deleteByDishId(dishDto.getId());
        List<DishFlavor> flavors = dishDto.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(flavor -> {
                flavor.setDishId(dish.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = dishMapper.getByid(id);
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.updateDish(dish);
    }

    @Override
    public List<DishVO> getByCategoryId(Integer categoryId) {
        List<DishVO> dishVOS= dishMapper.getByCategoryId(categoryId);
        return dishVOS;
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}